Fuel Economic Analysises For DA Series Gasoline Engine And The Vehicle

The article discuss the facts which affect the fuel consumption of the engine and the vehicle, and make special fuel economy estimate as to DA series engines including the vehicle state. Further more, the estimate means make discussed.The estimate means of the fuel consumption economy includes all load state performance, part load state performance, fuel consumption contour map, and the road resistance curve with fuel consumption contour in one map for the fuel consumption economy estimate of the simulative vehicle condition, which will help us to learn about the most economical work state in a relatively easy way, then we can decide the application aspect and find out the improve way.Using load ratio and engine power balance map to estimate the fuel consumption economy, from before and after simulative vehicle condition, estimate the engine and vehicle fuel consumption economy. At the same time, analyze the affection to the fuel consumption when changing the main transmission ratio and the sub transmission ratio. And also we make analysis with DA engine's vehicle condition, some conclusion are obtained.The main idea of this article is to find out solution to improving the fuel consumption economy by analyzing the fuel consumption of the DA series engine and the vehicle on the test bed, thus can supply reference for the engine research and development work. This will greatly help the performance of the vehicle matched with the newly developed out engine, the simulative vehicle condition in the lab research phrase is made pre-research. This article will help the vehicle factory to step out the mistake area that "It is just the engine which results in the high fuel consumption of the vehicle", and will supply some help to the future research and development work.